where \(\circ \)  denotes the Hadamard product [1]}. The number of clusters in a network is denoted by \(c\) , while the \(c\times 1\)  vector \(n\)  defines the size of each cluster:
\(n = \begin{bmatrix}n_{1} & n_{2} & \dots & n_{c}\end{bmatrix},\) 
